Patent US3407286A successfully refreshed from Google Patents.
US3407286A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic control with unijunction transistor
Assignee: Motors Liquidation Co
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Filing: 1966-05-12
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Granted: 1968-10-22
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Expires: 1986-05-12
Abstract
No abstract record available.
Inventors
- 👤 Alfred B Roby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:01
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/19; G05D23/20; G05D23/24; G05D23/1906; G05D23/1909
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
AN ELECTRICAL CONTROL SYSTEM INCLUDING A UNIJUNCTION TRANSISTOR HAVING TWO BASE TERMINALS AND AN EMITTER TERMINAL, AN ELECTRICAL LOAD ELECTRICALLY CONNECTED IN SERIES WITH ONE OF SAID BASE TERMINALS, A FIRST CAPACITOR ELECTRICALLY CONNECTED IN SHUNT CIRCUIT SHUNTING SAID TRANSISTOR AND SAID LOAD, A SECOND CAPACITOR ELECTRICALLY CONNECTED TO SAID EMITTER TERMINAL AND SAID LOAD, MEANS COMPRISING TWO CONDUCTORS ELECTRICALLY CONNECTED TO OPPOSITE TERMINALS OF SAID FIRST CAPACITOR FOR CHARGING SAID CAPACITORS AND ENERGIZING SAID LOAD AND TRANSISTOR, AND MEAN FOR VARYING THE CURRENT FLOW BETWEEN THE OTHER OF SAID BASE TERMINALS AND SAID EMITTER TERMINAL.
Claim 2
Dependent Claim
96 words
AN ELECTRICAL CONTROL SYSTEM INCLUDING A UNIJUNCTION TRANSISTOR HAVING TWO BASE TERMINALS AND AN EMITTER TERMINAL, AN ELECTRICAL LOAD ELECTRICALLY CONNECTED IN SERIES WITH ONE OF SAID BASE TERMINALS, A FIRST CAPACITOR ELECTRICALLY CONNECTED IN SHUNT CIRCUIT SHUNTING SAID TRANSISTOR AND SAID LOAD, A SECOND CAPACITOR ELECTRICALLY CONNECTED TO SAID EMITTER TERMINAL AND SAID LOAD, MEANS COMPRISING TWO CONDUCTORS ELECTRICALLY CONNECTED TO OPPOSITE TERMINALS OF SAID FIRST CAPACITOR FOR CHARGING SAID CAPACITORS AND ENERGIZING SAID LOAD AND TRANSISTOR, AND MEAN FOR VARYING THE CURRENT FLOW BETWEEN THE OTHER OF SAID BASE TERMINALS AND SAID EMITTER TERMINAL.
References Cited (Backward Citations)
US3136877A
Cited
US3299346A
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US3299345A
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US3275802A
Cited
US3299344A
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US3243609A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-22 | 1972-04-22 | 1972-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-22 | 1976-04-22 | 1976-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-22 | 1980-04-22 | 1980-10-22 | $7700.00 | Window Closed / Lapsed |